ON THE BOARDWALK: Go back in time with the Coney Island History Project’s History Day at Deno’s Wonder Wheel. Besides listening to live music by the Hungry March Band, the Banjo Rascals and Benjamin Ickies and the Coney Island Screamers, everybody gets one free ride on the Wonder Wheel — and a chance to explore the brand-new Coney Island Bathhouse Exhibit. 3059 W. 12th St., at the Boardwalk, Brooklyn, 1 p.m. to 6 p.m., free; 347-702-8553, coneyislandhistory.org

REBEL YELL: War. What is it good for? Fun re-enactments, of course, like what you’ll find at Civil War Weekend on Governors Island. Expect weapons and drill demonstrations (kids can join in, but not for the weapons part), historic tunes, authentic soldiers’ camps and more. 10 a.m. to 4 p.m., free. Get the ferry at the Battery Maritime Building, 10 South St. (on the water); 212-440-2200, govisland.com

GET ’EM TO THE GREEK: Opa! It doesn’t matter whether you’re Greek — you’ll have a blast regardless at Battery Park City’s Greek Family Dance. Learn authentic steps to the sound of live music provided by the Greek American Folklore Society and Friends (played on traditional instruments such as the laouto and kavali). 6:30 to 8 p.m., free. Esplanade Plaza, Liberty Street at South End Avenue; 212-267-9700, bpcparks.org

TOMORROW

FRINGE BENEFITS: It’s back! And this year’s Fort FringeJR (part of the New York International Fringe Festival) sounds better than ever. Check out excerpts from plays including “Super Sidekick: The Musical” and “The Great Pie Robbery” at today’s Meet the Cast event, free! 11 a.m. to 12:30 p.m., 1 E. Eighth St., near Fifth Avenue; 212-279-4488, fringenyc.org

HIP HOORAY: Your little one is way too cool to sing about wheels on a bus. That’s why you won’t want to miss the Hip Tot Music Fest at Littlefield in Brooklyn, where folksters Tres Leches and the reggae-flavored Rene Collins Band will open for Suzi Shelton. 2 p.m., $12 for adults, $8 for kids, $35 for families of four. 622 DeGraw St., between Third and Fourth avenues, Gowanus; 718-855-3388, littlefieldnyc.com